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From: amos@instable.UUCP (Amos Shapir)
Newsgroups: comp.lang.c
Subject: Re: Local string storage -- *guaranteed* static?
Message-ID: <814@instable.UUCP>
Date: Fri, 5-Jun-87 10:21:43 EDT
Article-I.D.: instable.814
Posted: Fri Jun  5 10:21:43 1987
Date-Received: Tue, 9-Jun-87 07:16:12 EDT
References: <7690@brl-adm.ARPA>
Reply-To: amos%nsta@nsc.com (Amos Shapir)
Distribution: world
Organization: National Semiconductor (Israel) Ltd. Home of the 32532
Lines: 20
Summary: All that is char * is not a string
Hdate: 8 Sivan 5747


To put this matter to sleep once and for all:
func() {
    char *str1 = "some string";
    static char *str2 = "another string";
    ...
}

str1 and str2 are *not* strings as defined by K&R p.181, they are char
pointers, str1 is automatic and str2 static. Whatever is between the "'s
is a string, i.e. an unnamed static array of chars, the address of whose
first element (0th, actually) is assigned to str1 or str2.
The assignment to str2 is done at compile time (or once at run time),
the assignment to str1 is done on every call to func()
(note that only the *address* of the string is assigned; if you change
its *contents*, they remain changed).
-- 
	Amos Shapir
National Semiconductor (Israel)
6 Maskit st. P.O.B. 3007, Herzlia 46104, Israel  Tel. (972)52-522261
amos%nsta@nsc.com @{hplabs,pyramid,sun,decwrl} 34 48 E / 32 10 N